This example visualizes total cancer deaths by U.S. state using a sequential color barchart. The bars encode the death count by height while their color reflects the death rate per 100,000 people, ranging from light to dark red. Hovering over a bar reveals precise values via a native title tooltip. The chart is built with D3 v7, using `d3.scaleBand` and `d3.scaleLinear` for axes, `d3.scaleSequential` with `d3.interpolateReds` for color, and the `d3-legend` plugin to display the color threshold legend. Data comes from the CORGIS dataset, rendered as SVG.